On Fri, 2019-12-20 at 21:12 +0100, Gimp_Noob wrote: > What should I do if I only have a .jpg file? In other words,there is > nothing to scan. If I remove too many speckles it looks fake.
There's no simple answer - you have to d the best you can with what you've got. Sometimes resizing (image->scale) by a factor of 3 can help: open image->scale image, append * 3 to the width and press tab, and GIMP will do the multiplication :) Use "cubic" interpolation. Then blur the now-larger image with radius 5. Then scale back down (again cubic but you could use / 3 instead of * 3 to have GIMP do the division) and then sharpen (filters->enhanve/>unsharp mask). Technically what's going on is that this procedure will give the image a wider number of pixel values - more greys - especially in 16 or 32 bit - and reduce some of the effects of jpeg artifacts. <ale sire the image is in greysvcale/grayscale or RGB mode first, not indexed, or it won't help. -- Liam Quin - web slave for https://www.fromoldbooks.org/ with fabulous vintage art and fascinating texts to read. Click here to have the slave make breakfast. _______________________________________________ gimp-user-list mailing list List address: gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list